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No. 623,957. Patented Apr. 25, I899.

- B. J. W. HAMILL.

LOCK COVER FOR MILK CANS.

(Application filed h m. 21, 1899.)

(No Model.)

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A Howey- WATENT Ni'rnn STATES Fr es.

ROBERT J. W. IIAMILL, OF BALTIMORE, MARYLAND, ASSIGNOR OF THREE- FOURTI-IS TO GEORGE W. EVANS, OF SAME PLACE.

LOCK-COVER FOR MILK-CANS.

SPECIFICATION forming part of Letters Patent No. 623,957, dated April 25, 1899.

Application filed January 21, 1899- Serial No. 702,880. (No model.)

To all whom, it may concern: thereby insures that it will not slide back ac- Be it known that I, ROBERT J. W. IIAMILL, cidentally after it has been looked. a citizen of the United States, residing at Bal- The cover I on the inside has an annular timore, in the State of Maryland,have inventrecess j adjoining the rim or down-flange 7r, ed certain new and useful Improvements in and a suitable gasket Z is in this recess.

Lock-Covers for Milk-Cans, of which the fol- WVhen the cover is in position on the can-collowing is a specification. lar B, the gasket fits on the rim edge of the This invention relates to a lock for securcollar and serves to make a tight joint and ing the covers on milk-cans. prevent leakage of milk should the can be 10 The invention is illustrated in the accomupset. Adjoining the locking-lug c on the panying drawings, in whichdown-flange 7c of the cover is a keyhole m.

Figure 1 is a side elevation of a milk-can, In practice a small slip of paper is inserted the cover of which is removed and shows the in the cover and over this keyhole, on the inlock as it appears atjone side of the collar. side, before placing the coveron the milk-can.

I5 Fig. 2 is a diametrical section of the cover The lug c on the cover takes in the grooveand shows the lugs which coact with the lock entrance 0', and the other lug 6 takes in the parts on the can. Fig. 3 is a side elevation groove-entrance (1' back of the bolt 8. Then of amilk-can, the cover of which is removed, a partial rotation of the cover 1 causes the and shows a recess on the side of the collar lug c to pass along the groove 0, whose upper 20 opposite that seen in Fig. 1. Fig. 4 is a diedge is slightly inclined, and at the same ametrical section of the cover, being the side time the lug e pushes the bolt along across opposite that seen in Fig. 2, and shows a lug the entrance 0 and until the point end g of that cooperates with the recess seen in Fig. 3. the bolt enters the branch groove g, and there- Fig. 5 is a perspective view, on a larger scale, by completes the locking operation. Now if 25 of the locking-bolt shown in position on the the cover be rotated in the reverse direction collar in Fig. 1. Fig. 6 shows the collar with the bolt ewill not be retracted, but the lockthe bolt in the locked position. ing-lug 0 will come under the bolt, and hence The milk-can A may be of any preferred cannot pass up and out of the entrance 0, shape or size. A metal collar B surrounds and thereby the cover will be locked to the 30 the top or neck of the can. At one side this can. In order to unlock it, the end of a suitcollar has two circumferentially-extending ablypointed instrument must be inserted grooves or recesses c and 01, each of which from the outside through the hole m and has a right-angled branch 0' and d, opening puncture the slip of paper, and the end of upward at the rim edge of the collar. One said instrument will bear against the point 35 of these grooves c c is to receive the lockingend 9 of the bolt and be held there, and the lug c on the cover, and the other groove d latter may then be forced back to the unlocked contains a locking-bolt e, which is movable or position by simply rotating the cover I in the slidabletherein. This grooved and its rightreverse direction. Down to this point the angled entrance cl also receive the push-lug lock parts at one side only of the collar and 0 c on the cover, which pushes the bolt 6 when cover have been described; but those on the the cover is partly rotated on the can-collar. opposite side (shown in Figs. 3 and 4) will The locking-bolt e is confined to the groove now be described.

d, in which it slides, bya thin piece of metal The collar B at a point diametrically opplate f, which keeps the bolt from falling out posite the locking-bolt c has a circumferen- 45 when the cover is off. When this bolt is in tial groove n with entrance n at the rim edge 5 the shot position, (see Fig. 6,) its point end and an inclined upper edge n at the extremg takes in a branch g of the -groove c. The ityof the groove. The cover on the inside bolt has one side faced with a thin sheet of of its down-flange 7.0 has a lug 0, which passes rubber h, held by cement. This rubber preinto the entrance n and then into the groove n 50 vents the bolt from slipping too easily, and and when the cover is partly rotated passes 10o finally into the extremity of the groove where the upper edge n is inclined. This holds the cover down.

This invention is to operate similarly to that shown and described in Letters Patent of the United States, granted George V. Evans August 4:, 1885, No. 323,864, and is animproveinent thereon.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of a milk-can collar having a eircumferentially-extending lock ing-groove, and a circumferentially-sliding bolt independent of the locking-groove but serving to guard the entrance of said groove; and a cover having a down-flange which takes overand surrounds the said collartl1e downfiange being provided on the inside with a lug which engages the locking-groove, and a second lug which pushes the bolt to the locked position when the cover is partly rotated.

2. The combination of a milk-can collar having a circumferentially-extending locking-groove, and a circinnferentially-sliding bolt provided with a rubber facing to prevent the bolt from slipping accidentally; and a cover having a down-flange which takes over and surrounds the said collarthe down- Ilange being provided on the inside with a lug which engages the locking-groove, and a second lug which takes back of said bolt and pushes the bolt to the locked position when the cover is partly rotated.

The combination of a milk-can provided at the neck-openingwithacollar; two circum ferentially-extending grooves atone side of the collar; a sliding bolt located in one of-said grooves; a circumferential groove in the collar diametrieally opposite the groove carrying the bolt; a cover having a down-flange and three lugs on the inside of the said down-flange said lugs registering with the entrances of the grooves on the collar, whereby when the cover is on a partial revolution of the cover will cause two of the lugs to engage grooves and the other lug to coaet with the bolt and lock the cover on the collar, as set forth.

at. The combination of a milk-can collar having a locking-groove provided with a rightangled branch, 0, and a parallel branch, g; a circu mferentially-extendin g groove, (Z, having position above said locking-groove and coincident with said parallel branch; a sliding bolt in said upper groove and adapted to have one end entered in the parallel branch; and a cover having a down-flange which surrounds said collar, said down-flange being provided on the inside with a lug which engages the locking-groove and a second lug which pushes the bolt into the parallel branch when the cover is partly rotated, substantially as described.

In testimony whereof I al'fix my signature in the presence of two witnesses.

ROBERT J. V. llAMlLL.

\Vitnesses:

CHARLES I MANN, Jn, GEO. Kon'rnnn. 

